The surface area of an object is the total area of the outside surfaces of the object.
The surface area of certain simple objects such as cubes and prisms can be calculated using formulae.
The units of surface area include cm2 and m2.
Volume and surface area formulae
Only the cube and cuboid formulae need to be memorised.
|
Solid Name
|
Diagram
|
Surface Area
|
Cube |
 |
S = 2l2 + 2l2 + 2l2 = 6l2 |
Cuboid or Rectangular Prism |
 |
S = 2bh + 2hl + 2bl |
Prism |
 |
S = bl + al + cl + 2 × (0.5bh) where the area of each end is 0.5bh |
 |
S = sum of areas of each face
|
